Add missing stack frames

[antonpirker]

Add a new init() option add_full_stack (default False), when set to True it will add all the missing frames from the beginning of the execution to the stack trace sent to Sentry.

Also adds another option max_stack_frames (default 100) to limit the number of frames sent. The limitation is only enforced when add_full_stack=True to not change behavior for existing users.

Documentation update: getsentry/sentry-docs#11844

Fixes #3646

[codecov]

Codecov Report

Attention: Patch coverage is 94.44444% with 1 line in your changes missing coverage. Please review.

Project coverage is 79.95%. Comparing base (e7130e8) to head (9f8bc18).
Report is 7 commits behind head on master.

✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
sentry_sdk/utils.py	93.75%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3673      +/-   ##
==========================================
+ Coverage   79.94%   79.95%   +0.01%     
==========================================
  Files         137      137              
  Lines       15421    15437      +16     
  Branches     2614     2619       +5     
==========================================
+ Hits        12328    12343      +15     
  Misses       2223     2223              
- Partials      870      871       +1     

Files with missing lines	Coverage Δ
sentry_sdk/consts.py	93.27% <100.00%> (+0.06%)	⬆️
sentry_sdk/utils.py	83.96% <93.75%> (+0.15%)	⬆️

... and 2 files with indirect coverage changes

[asottile-sentry]

while the implementation seems fine -- I'm not sure this is going to be super useful being a global option -- I would imagine this is going to be more useful on a callsite-by-callsite basis?